Cassandra L. Ernst, PA-C
- Medicare services, 2024
- 2,617
- Medicare patients, 2024
- 635
- Part D claims, 2024
- 1,338
- Hospital affiliations
- 1
- Industry payments
- $2,827
- Practice address
- 1635 Eagle Harbor Pkwy, Fleming Island, FL 32003
- Practice phone
- Call (904) 384-2240
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
North East Florida Endocrine and Diabetes Association
Fleming Island, Florida
Find Cassandra Ernst's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Cassandra L. Ernst is a physician assistant in Fleming Island, Florida
Cassandra Ernst practices at North East Florida Endocrine and Diabetes Association in Fleming Island, Florida.
Cassandra Ernst's NPI, 1285767103, was assigned on March 13, 2007. Cassandra Ernst holds Florida license PA3286.
- NPI
- 1285767103NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9032217369
- NPI enumeration date
- March 13, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (904) 384-2240
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Cassandra L. Ernst practices at North East Florida Endocrine and Diabetes Association in Fleming Island, Florida
Cassandra Ernst's primary practice is North East Florida Endocrine and Diabetes Association, at 1635 Eagle Harbor Pkwy, Fleming Island, FL 32003 in Clay County. The practice phone is (904) 384-2240.
- North East Florida Endocrine and Diabetes Association1635 Eagle Harbor Pkwy, Fleming Island, FL 32003 · Clay CountyPhone(904) 384-2240
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Cassandra L. Ernst is affiliated with 7 sites of care and 5 medical groups
Cassandra Ernst's primary practice is North East Florida Endocrine and Diabetes Association in Fleming Island, Florida. Cassandra Ernst is also affiliated with Baptist Medical Center Jacksonville. The medical group on file is St. Vincent's Healthcare. Dmand AI also links Cassandra Ernst to 5 more group practices and clinics and 4 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Cassandra L. Ernst's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Cassandra Ernst practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| North East Florida Endocrine and Diabetes Association | Available with a free account |
| +6 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Cassandra L. Ernst is one of 7,899 physician assistants in Florida
Physician assistant is Cassandra Ernst's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Cassandra Ernst is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA). Cassandra Ernst is licensed in Florida.
Specialties and state licenses
- Physician assistant, FloridaPrimary
Clinical focus
Dmand AI lists diabetic emergency and osteoporosis among the conditions Cassandra Ernst treats.
Physician assistants near Cassandra Ernst
Counts of physician assistants with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Cassandra L. Ernst billed Medicare for 2,617 services in 2024
CMS data shows 2,617 Medicare services from Cassandra Ernst across 9 procedure codes in 2024, for 635 Medicare patients. Medicare paid $135,638 for them.
Cassandra Ernst's Medicare services by type, 2024
- Office and hospital visits2,168
- Other services268
- Tests and treatments126
- Imaging55
Where Cassandra Ernst's Medicare services took place, 2024
- In an office1,01539%
- In a facility1,60261%
Cassandra Ernst compared with the Florida median for physician assistants, 2024
- Cassandra Ernst
- Florida median
- Medicare services
- 2,617vs 3218.2 times
- Medicare patients
- 635vs 1304.9 times
- Part D claims
- 1,060vs 3263.3 times
Medians across 5,430 physician assistants in Florida with Dmand AI profiles that report each measure.
Cassandra Ernst's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Cassandra L. Ernst treated 635 Medicare patients in 2024, average age 74
CMS counts 635 Medicare patients who saw Cassandra Ernst in 2024. The largest group is 65 to 74, with 261 patients. 75% of them have diabetes, and 75% have high blood pressure. 15% are also on Medicaid. Their average risk score is 2.62, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Cassandra Ernst's median patient age at 65, with 65% women.
Cassandra Ernst's Medicare patients by age, 2024
Cassandra Ernst's Medicare patients by sex, 2024
- Women37559%
- Men26041%
Chronic conditions among Cassandra Ernst's Medicare patients, 2024
- Diabetes75%
- High blood pressure75%
- High cholesterol75%
- Arthritis57%
- Chronic kidney disease54%
- Ischemic heart disease53%
- Heart failure42%
- Mood disorders42%
Share of Medicare patients with each condition. A patient can have several.
Cassandra Ernst's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women65%
- Men35%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Cassandra L. Ernst wrote 1,338 Medicare Part D claims in 2024
In 2024, Cassandra Ernst wrote 1,338 Medicare Part D claims for 327 patients. 32% of them were for generic drugs. CMS names the drug for 1,060 of them, across 24 drugs with 11 or more claims each, at $428,170 in total drug cost.
Cassandra Ernst's Part D claims by kind of drug, 2024
- Generic429 claims32%
- Brand-name824 claims62%
- Other85 claims6%
Cassandra Ernst's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Cassandra L. Ernst offers telehealth to Medicare patients
Cassandra Ernst accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Cassandra Ernst as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Cassandra L. Ernst received $2,827 in industry payments from 2024 to 2025
CMS Open Payments shows 115 general payments to Cassandra Ernst from 23 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Dexcom, Inc. paid the most, $444.
General payments to Cassandra Ernst by program year, 2024 to 2025
Companies that paid Cassandra Ernst the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Cassandra L. Ernst is board certified in certified physician assistant
- Board certified in certified physician assistant
Source: Dmand AI Professional Profile Data
Sources for Cassandra L. Ernst's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Cassandra L. Ernst
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Cassandra L. Ernst's NPI number?
Cassandra L. Ernst's NPI number is 1285767103. It was assigned on March 13, 2007, and it is active in the NPI Registry.
What does Cassandra L. Ernst specialize in?
Cassandra L. Ernst is a physician assistant in Fleming Island, Florida. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Cassandra L. Ernst practice?
Cassandra Ernst practices at 1635 Eagle Harbor Pkwy, Fleming Island, FL 32003. Cassandra Ernst's primary practice is North East Florida Endocrine and Diabetes Association in Fleming Island, Florida. Dmand AI also links Cassandra Ernst to 5 group practices and clinics and 4 medical groups.
What is Cassandra L. Ernst's office phone number?
The practice phone on file for Cassandra Ernst is (904) 384-2240.
What is Cassandra L. Ernst's medical license number?
Cassandra Ernst holds Florida license PA3286.
Which hospitals is Cassandra L. Ernst affiliated with?
Cassandra Ernst is affiliated with Baptist Medical Center Jacksonville.
What medical group is Cassandra L. Ernst part of?
Cassandra Ernst is linked to St. Vincent's Healthcare. Dmand AI links Cassandra Ernst to 4 more medical groups.
Does Cassandra L. Ernst accept Medicare?
Yes. CMS data shows Cassandra Ernst billed Medicare for 2,617 services in 2024, and Cassandra Ernst accepts Medicare assignment.
Does Cassandra L. Ernst offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Cassandra Ernst as offering telehealth services.
How many Medicare patients does Cassandra L. Ernst see?
CMS counts 635 Medicare patients who saw Cassandra Ernst in 2024, with an average age of 74.
Show 5 more questionsShow fewer questions
Is Cassandra L. Ernst board certified?
Yes. Cassandra Ernst is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA).
What services does Cassandra L. Ernst bill to Medicare?
In 2024, Cassandra Ernst's most billed Medicare services were hospital inpatient care (99232), office visit, established patient (99214) and hospital inpatient care (99231).
What drugs does Cassandra L. Ernst prescribe most?
In 2024 Medicare Part D data, Cassandra Ernst's most prescribed drugs by claims were Levothyroxine Sodium, Ozempic and Lantus Solostar.
Has Cassandra L. Ernst received payments from drug or device companies?
CMS Open Payments shows $2,827 in general payments to Cassandra Ernst from 23 companies from 2024 to 2025. The largest total came from Dexcom, Inc.
How long has Cassandra L. Ernst been practicing?
Cassandra Ernst graduated from medical school in 1995, 31 years ago.
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